FAN54300 Datasheet, PDF (1/43 Pages) Fairchild Semiconductor – USB-Compliant, Dual-Power Input, Single-Cell, Li-Ion Switching Charger with USB-OTG Boost Regulator

August 2013
FAN54300 — USB-Compliant, Dual-Power Input, Single-Cell,
Li-Ion Switching Charger with USB-OTG Boost Regulator
Features
 Fully Integrated, High-Efficiency Charger for Single-Cell
Li-Ion and Li-Polymer Battery Packs
 Accepts USB or Dedicated Power Input Source
 5 V, 300 mA Boost Mode for USB OTG from 2.5 to 4.5 V
Battery Input
 Charge Voltage Accuracy: 0.5% at TA=25°C
1% from TA=0 to 125°C
 5% USB Input Current Regulation Accuracy
 5% Charge Current Regulation Accuracy
 20 V Absolute Maximum Input Voltage
 9.5 V Maximum Input Operating Voltage on VIN Pin,
6.5 V Maximum on VBUS Pin
 Up to 1.5 A Maximum Charge Rate
 Programmable Charge and Mode through High-Speed I²C
Interface (3.4 Mb/s) with Fast Mode Plus Compatibility
– Input Current
– Fast-Charge / Termination Current
– Charger Voltage
– Safety Timer
– Termination Enable
 3 MHz Synchronous Buck PWM Controller with Wide Duty
Cycle Range
 Small Footprint, 1 H, External Inductors
 Safety Timer with Reset Control
 Weak Input Sources Accommodated by Reducing
Charging Current to Maintain Minimum VBUS Voltage
 Low Reverse Leakage from Battery Drain to VBUS or VIN
 Programmable LED Drive for Charge Indication
 Register and Slave Addresses Compatible with FAN540X
and FAN542X Families
Description
The FAN54300 combines two highly integrated switch-mode
chargers and a boost regulator to minimize single-cell Li-Ion
charging time from a USB and/or auxiliary power source.
Charging parameters and operating modes are programmable
through an I²C Bus® interface that operates up to 3.4 Mbps.
The charger and boost regulator circuits switch at 3 MHz to
minimize the size of the external passive components.
The FAN54300 provides battery charging in three phases:
conditioning, constant current, and constant voltage.
To ensure USB compliance and minimize charging time, the
USB input current is limited to the value set through the I²C
host. Charge termination is determined by a programmable
minimum current level. A safety timer with reset control
provides a safety backup for the I²C host.
The IC automatically restarts the charge cycle when the
battery falls below an internal threshold. If the input source is
removed, the IC enters a high-impedance mode, with leakage
from the battery to the input prevented. Charge status is
reported back to the host through the I²C port. Charge current
is reduced when the die temperature reaches 120°C.
The FAN54300 can operate as a boost regulator on command
from the system. The boost regulator includes a soft-start that
limits inrush current from the battery.
The FAN54300 is available in a 30-bump, 0.4 mm pitch,
wafer-level, chip-scale package (WLCSP).
Applications
 Cell Phones, Smart Phones, PDAs
 Digital Cameras
 Portable Media Players
Ordering Information
Part Number Temperature Range
FAN54300UCX
-40 to 85°C
© 2010 Fairchild Semiconductor Corporation
FAN54300 • Rev. 1.0.4
Package
30-Ball, WLCSP, 5x6 Array, 0.4mm Pitch,
586 µm Package Height
Packing
Tape and Reel
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